Tell-a-Friend
275 websites

Tell-a-Friend is free to use

http://tellafriend.socialtwist.com/

SocialTwist is a customer acquisition and retention platform that generates viral referrals for businesses, using the social connections of their customers.

VS

WhosOn
532 websites

WhosOn offers both free and paid options

http://www.whoson.com/

Track, Engage and Chat to your web visitors in real time. Hosted and On Premises live chat and visitor tracking software for businesses of all sizes.

Market Share by Top Websites

1 WhosOn is leading in Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Tell-a-Friend is clearly lagging behind, losing to WhosOn in all segments.

Websites Categories

1 WhosOn has better usage coverage in more websites categories. Including Home & Garden, Finance, Computers Electronics & Technology, Health and 10 other categories.

2 Tell-a-Friend is leading in Science & Education, Arts & Entertainment, Community & Society, Jobs & Career and 4 other categories.

Geography

1 WhosOn is leading in most countries, including United Kingdom, United States, Canada, France and 29 other countries.

2 Tell-a-Friend is leading in India, Spain, Turkey, Belgium and 17 other countries.